The Apostle Paul
Galatians 6:12ESV·traditional attribution

It is those who want to make a good showing in the flesh who would force you to be circumcised, and only in order that they may not be persecuted for the cross of Christ.

John Calvin Reformed @genevareformer

12. As many as desire to make a fair shew in the flesh. Such men pay no regard to edification, but are guided by an ambitious desire to hunt after popular applause. The Greek verb εὐπροσωπὢσαι, “The word we render, ‘to make a fair shew,’ properly signifies to be handsome and lovely.

Matthew Henry Presbyterian @wholebiblehenry

The apostle, having at large established the doctrine of the gospel, and endeavoured to persuade these Christians to a behaviour agreeable to it, seems as if he intended here to have put an end to the epistle, especially when he had acquainted them that, as a particular mark of his respect for them, he had written this large letter with his own hand, and had...

Commenting on Galatians 6:11-18

John Gill Reformed Baptist @doctorgill

But neither they themselves that are circumcised,.... That is, the pleaders for, and preachers of circumcision, whether they themselves were actually circumcised, or not; it means those that were of the circumcision, on that side of the question, whether heartily or not: keep the law; of circumcision, as persons may preach up that, which they themselves do not practise; as did the Pharisees, the predecessors...